In a flat dish, combine parmesan, flour, panko crumbs and season it with salt and pepper.
In a separate bowl, whisk egg together with milk.
Slice fish into serving size portions. Dip fish fillets into egg mixture and then into panko crumbs mixture.
Preheat skillet to a medium high, with a bit of oil. Fry fish a few minutes on each side until golden brown. Fry it for about 5 minutes, depending on the thickness of the fish. Clean off extra crumbs between each fish fillets.
Serve hot. Fish goes great with some rice and salsa.